Underground Electrical Cable Vs Overhead Lines

And 2 dissipating the heat produced during the operation of the electrical.

Underground electrical cable vs overhead lines.

Significantly less cost especially initial cost. In overhead line inductor plays major roles and in underground cable the capacitor plays major role. To minimize a large charging current produced in high voltage cables the length of the cable should be minimized. Overhead lines interfere with communication lines that are in close proximity have corona discharge radio and tv interference which does not happen with the underground lines.

20 to 40 for new underground works. 1 providing sufficient insulation so that cables can be within inches of grounded material. According to the may 2011 paper underground electric transmission lines published by the public service commission of wisconsin the estimated cost for constructing underground transmission lines ranges from 4 to 14 times more expensive than overhead lines of the same voltage and same distance. With overhead lines you have to watch that tall trucks farm implements augers and other tall pieces of equipment don t get tangled in them.

The electric field of the cable lines is fully limited by the metallic screen. Moreover laying or burying cost of underground lines are greater compare to overhead lines. The design and construction of underground transmission lines differ from overhead lines because of two significant technical challenges that need to be overcome. With underground feeders you have to watch out when you are digging.

Hvdc are three times higher compare to overhead lines e g. Following are the disadvantages of underground transmission. Much less visual clutter. Reliability shorter outage durations because of faster fault finding and faster.

Cost overhead s number one advantage. Aesthetics underground s number one advantage. Cost of underground cables e g. Undergrounding is the replacement of overhead cables providing electrical power or telecommunications with underground cables it demonstrates the higher technology in developed countries for fire prevention and to make the power lines less susceptible to outages during high wind thunderstorms or heavy snow or ice storms.

Overhead lines are nothing but a conductor laid on the top of earth by installing transmission tower. Safety less chance for public contact. It is difficult to find and repair the wire breaks in case of failure of system. Digging around underground feeders is a disaster waiting to happen.

Longer life 30 to 50 years vs.